I firmly believe in the Creation account as given to us in the Genesis account. While no one can 'prove' either theory (I call BOTH theories because NO ONE alive saw either happen and MANY will not accept the Bible as an eye-witness account!), the evidence that we all have to weigh is the same...and it points towards Genesis. 'Creation' itself does not answer every question, but once you consider the global flood as prescribed in the Genesis account the scales keeps tipping toward Creation! The Grand Canyon...fossils on tops of mountains (We found one out on one of our nature hikes in Wales, UK!)...etc....